In September 2018, Mozilla announced GeckoView, the foundation of Mozilla's next generation of mobile products based on a software library that makes Gecko reusable for Android, encompassing newer software development efforts to "decouple the engine itself from its user interface, and made it easy to embed in other applications". Additional components will be merged from Servo to Gecko incrementally in future versions. These include increased performance in the CSS and GPU rendering components. Firefox 57, also known as "Firefox Quantum", first shipping in November 2017, is the initial version with major components from the Quantum/Servo projects enabled. It included numerous improvements to Gecko, taken from the experimental Servo project. In October 2016, Mozilla announced Quantum, an ongoing project encompassing several software development efforts to "build the next-generation web engine for Firefox users". Today, Gecko is developed by employees of the Mozilla Corporation, employees of companies that contribute to the Mozilla project, and volunteers. On July 15, 2003, AOL laid off the remaining Gecko developers and the Mozilla Foundation (formed on the same day) became the main steward of Gecko development. However, with the exception of a few betas, Gecko was never used in the main Microsoft Windows AOL client. America Online, by this time Netscape's parent company, eventually adopted it for use in CompuServe 7.0 and AOL for Mac OS X (these products had previously embedded Internet Explorer). Īs Gecko development continued, other applications and embedders began to make use of it. Netscape 6, the first Netscape release to incorporate Gecko, was released in November 2000 (the name Netscape 5 was never used). It also meant that most of the work done for Netscape Communicator 5.0 (including development on the Mariner improvements to the old layout engine) had to be abandoned. While this decision was popular with web standards advocates, it was largely unpopular with Netscape developers, who were unhappy with the six months given for the rewrite. In October 1998, Netscape announced that its next browser would use Gecko (which was still called NGLayout at the time) rather than the old layout engine, requiring large parts of the application to be rewritten. While Mozilla Organization (the forerunner of the Mozilla Foundation) initially continued to use the NGLayout name (Gecko was a Netscape trademark), eventually the Gecko branding won out. Netscape later rebranded NGLayout as Gecko. Originally unveiled as Raptor, the name had to be changed to NGLayout (next generation layout) due to trademark problems. At least one more major revision of Netscape was expected to be released with the old layout engine before the switch.Īfter the launch of the Mozilla project in early 1998, the new layout engine code was released under an open-source license. The new layout engine was developed in parallel with the old, with the intention being to integrate it into Netscape Communicator when it was mature and stable. The existing Netscape rendering engine, originally written for Netscape Navigator 1.0 and upgraded through the years, was slow, did not comply well with W3C standards, had limited support for dynamic HTML and lacked features such as incremental reflow (when the layout engine rearranges elements on the screen as new data is downloaded and added to the page). History ĭevelopment of the layout engine now known as Gecko began at Netscape in 1997, following the company's purchase of DigitalStyle. Mozilla officially supports its use on Android, Linux, macOS, and Windows. It is free and open-source software subject to the terms of the Mozilla Public License version 2. Gecko is written in C++ and JavaScript, and, since 2016, additionally in Rust. Gecko offers a rich programming API that makes it suitable for a wide variety of roles in Internet-enabled applications, such as web browsers, content presentation, and client/server. Gecko is designed to support open Internet standards, and is used by different applications to display web pages and, in some cases, an application's user interface itself (by rendering XUL). It is used in the Firefox browser, the Thunderbird email client, and many other projects. Gecko is a browser engine developed by Mozilla.
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